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Title: Fracture resistance of high entropy alloys: A review

Abstract

Fascinated by the exceptional mechanical properties of high entropy alloys (HEAs), unremitting endeavors are placed on accelerating their engineering applications in multiple critical fields. As all other structural materials, attaining sufficient fracture resistance is a vital requirement for HEAs, particularly for safety critical applications. Along this line, the fracture resistance of a number of HEAs and medium-entropy alloys (MEAs) had been studied in the past decade. While some exhibit unprecedented fracture toughness akin to the toughest materials ever known, others are just alike brittle materials. Herein, we summarize one decade of investigations of the fracture resistance of HEAs and MEAs, including the characterization of fracture toughness, disclosure of fractographic characteristics, and understanding of fracture micro-mechanisms. The role of alloy composition, temperature, phase constituent, and characterization techniques in altering the fracture toughness are discussed; characteristics of the cleavage and shear fractures are detailed; toughening and weakening mechanisms, from the atomic to the defect level, are reviewed. In conclusion, some key questions are raised, and the directions for future research are suggested.

Authors:
 [1];  [2];  [3]
  1. Wuhan Univ. of Technology, Wuhan (China); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1543239
Alternate Identifier(s):
OSTI ID: 1530646
Grant/Contract Number:  
[AC05-00OR22725]
Resource Type:
Accepted Manuscript
Journal Name:
Intermetallics
Additional Journal Information:
[ Journal Volume: 99; Journal Issue: C]; Journal ID: ISSN 0966-9795
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Fracture toughness; Fractography; Fracture micromechanism; Temperature effect; Toughening; Strength-toughness conflict

Citation Formats

Li, Weidong, Liaw, Peter K., and Gao, Yanfei. Fracture resistance of high entropy alloys: A review. United States: N. p., 2018. Web. doi:10.1016/j.intermet.2018.05.013.
Li, Weidong, Liaw, Peter K., & Gao, Yanfei. Fracture resistance of high entropy alloys: A review. United States. doi:10.1016/j.intermet.2018.05.013.
Li, Weidong, Liaw, Peter K., and Gao, Yanfei. Tue . "Fracture resistance of high entropy alloys: A review". United States. doi:10.1016/j.intermet.2018.05.013. https://www.osti.gov/servlets/purl/1543239.
@article{osti_1543239,
title = {Fracture resistance of high entropy alloys: A review},
author = {Li, Weidong and Liaw, Peter K. and Gao, Yanfei},
abstractNote = {Fascinated by the exceptional mechanical properties of high entropy alloys (HEAs), unremitting endeavors are placed on accelerating their engineering applications in multiple critical fields. As all other structural materials, attaining sufficient fracture resistance is a vital requirement for HEAs, particularly for safety critical applications. Along this line, the fracture resistance of a number of HEAs and medium-entropy alloys (MEAs) had been studied in the past decade. While some exhibit unprecedented fracture toughness akin to the toughest materials ever known, others are just alike brittle materials. Herein, we summarize one decade of investigations of the fracture resistance of HEAs and MEAs, including the characterization of fracture toughness, disclosure of fractographic characteristics, and understanding of fracture micro-mechanisms. The role of alloy composition, temperature, phase constituent, and characterization techniques in altering the fracture toughness are discussed; characteristics of the cleavage and shear fractures are detailed; toughening and weakening mechanisms, from the atomic to the defect level, are reviewed. In conclusion, some key questions are raised, and the directions for future research are suggested.},
doi = {10.1016/j.intermet.2018.05.013},
journal = {Intermetallics},
number = [C],
volume = [99],
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

Figures / Tables:

Table 1 Table 1: Fracture-toughness data along with other relevant information for HEAs compiled from the literature.

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Works referencing / citing this record:

High-entropy alloys fabricated via powder metallurgy. A critical review
journal, March 2019


Hot Deformation Behavior and Hardness of a CoCrFeMnNi High-Entropy Alloy with High Content of Carbon
journal, May 2019

  • Wang, Yi-Tao; Li, Jian-Bo; Xin, Yun-Chang
  • Acta Metallurgica Sinica (English Letters), Vol. 32, Issue 8
  • DOI: 10.1007/s40195-019-00916-0